320699903 has 2 divisors, whose sum is σ = 320699904. Its totient is φ = 320699902.

The previous prime is 320699861. The next prime is 320699923. The reversal of 320699903 is 309996023.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320699903 - 2⁶ = 320699839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320699923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160349951 + 160349952.

It is an arithmetic number, because the mean of its divisors is an integer number (160349952).

Almost surely, 2^320699903 is an apocalyptic number.

320699903 is a deficient number, since it is larger than the sum of its proper divisors (1).

320699903 is an equidigital number, since it uses as much as digits as its factorization.

320699903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 41.

The square root of 320699903 is about 17908.0960182818. The cubic root of 320699903 is about 684.4886894187.

The spelling of 320699903 in words is "three hundred twenty million, six hundred ninety-nine thousand, nine hundred three".